<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <title>400 - 请求错误</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="description" content="HTTP 400 错误页面 - 请求语法错误">
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Microsoft YaHei', sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #333;
    }
    
    .container {
      background: white;
      border-radius: 20px;
      padding: 3rem;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
      text-align: center;
      max-width: 500px;
      width: 90%;
      margin: 2rem;
    }
    
    .error-icon {
      font-size: 4rem;
      color: #e74c3c;
      margin-bottom: 1rem;
    }
    
    .error-code {
      font-size: 6rem;
      font-weight: bold;
      color: #e74c3c;
      margin: 1rem 0;
      line-height: 1;
    }
    
    .error-title {
      font-size: 1.8rem;
      color: #2c3e50;
      margin-bottom: 1rem;
    }
    
    .error-description {
      color: #7f8c8d;
      margin-bottom: 2rem;
      line-height: 1.6;
    }
    
    .error-details {
      background: #f8f9fa;
      border-radius: 10px;
      padding: 1.5rem;
      margin-bottom: 2rem;
      text-align: left;
    }
    
    .error-details h3 {
      color: #e74c3c;
      margin-bottom: 1rem;
      font-size: 1.1rem;
    }
    
    .error-details ul {
      list-style: none;
      padding: 0;
    }
    
    .error-details li {
      margin-bottom: 0.8rem;
      padding-left: 1.5rem;
      position: relative;
      color: #555;
    }
    
    .error-details li::before {
      content: "▶";
      position: absolute;
      left: 0;
      color: #e74c3c;
      font-size: 0.8rem;
    }
    
    .solution {
      background: #d4edda;
      border-left: 4px solid #28a745;
      padding: 1rem;
      border-radius: 5px;
      margin: 1rem 0;
    }
    
    .solution h4 {
      color: #155724;
      margin-bottom: 0.5rem;
    }
    
    .solution p {
      color: #155724;
      margin: 0.5rem 0;
    }
    
    .back-button {
      display: inline-block;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      text-decoration: none;
      padding: 12px 30px;
      border-radius: 25px;
      font-weight: 500;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      margin: 0.5rem;
    }
    
    .back-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
    }
    
    .contact-info {
      margin-top: 2rem;
      padding-top: 2rem;
      border-top: 1px solid #ecf0f1;
      color: #7f8c8d;
      font-size: 0.9rem;
    }
    
    @media (max-width: 600px) {
      .container {
        padding: 2rem;
        margin: 1rem;
      }
      
      .error-code {
        font-size: 4rem;
      }
      
      .error-title {
        font-size: 1.5rem;
      }
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="error-icon">⚠️</div>
    <div class="error-code">400</div>
    <h1 class="error-title">请求错误</h1>
    <p class="error-description">
      服务器无法处理您的请求，因为请求格式不正确或包含错误参数。
    </p>
    
    <div class="error-details">
      <h3>🔍 可能的原因：</h3>
      <ul>
        <li>URL格式错误或包含无效字符</li>
        <li>请求头信息不完整或格式错误</li>
        <li>Cookie数据损坏或过大</li>
        <li>请求体数据格式不符合服务器要求</li>
      </ul>
      
      <div class="solution">
        <h4>💡 解决方案：</h4>
        <p>• 检查URL拼写是否正确</p>
        <p>• 清除浏览器缓存和Cookie（Ctrl+Shift+Delete）</p>
        <p>• 刷新页面或重新访问</p>
        <p>• 联系网站管理员</p>
      </div>
    </div>
    
    <a href="javascript:history.back()" class="back-button">返回上一页</a>
    <a href="/" class="back-button">返回首页</a>
    
    <div class="contact-info">
      <p>如问题持续存在，请联系技术支持</p>
      <p>官网：<a href="schub.icu" target="_blank" style="color: #667eea;">schub.icu</a></p>
    </div>
  </div>
</body>
</html>